Loose-leaf binder



Sept. 6,1927. 1, 41,111

R. M. VAN VALKENBURGH LOOSE LEAF BINDER Filed 14112.25. 192 k INVENTOR.

Ricligrd Ml/aflhlkenh umh Patented Sept. 6, 1927.

UNI-Tee[STATES RICHARD M. VAN vA KnNBUReEor KANSAS. CITY, MISSOURI,assrenoa TO IRVING- PITT MANUFACTURING COMPANY, 'OFYKANSAS CITY,MISSOURI, A con-roaarrouor MISSOURI.

. Application filed August-25, 1926.

This invention relates to loose leaf binders and has for its primaryobject the provision of a novel means for supporting the flexiblearcuate' back plate of a ringbinder which is used to carry a pair ofring-supporting members articulated at their inner edge in such a mannerthat the rings are snapped to the open and closed position in the wellknown manner.

One of the primary objects of the present invention is'the contemplationof a binder structure wherein the flexible arcuate back plate issupported independently of the back member of the binder.

Another object of this invention is the provision of a new binderstructure which includes means for hingedly supporting the flexiblearcuate back plate of a ring binder, which means are rigidly secured tothe two covers respectively of the binder.

Minor objects and specific details of this invention will appear duringthe course of the specification, referring to the accompanying drawing,in which:

Figure 1- is a fragmentary perspective view of a ring binder made inaccordance with this invention; and

Fig. 2 is a cross section through the same.

It is well known in the art that the usual custom of affixing theflexible arcuate back plate of a ring binder has been to secure the samethrough some suitable means to the flexible back of the book which joinsthe two covers. This practice limits the use of some desirable materialsand always renders the back of the binder more or less rigid inappearance. It has been found that many other minor shortcomings of theordinary ring binder structure are overcome through the use of ahingedly supported arcuate back plate and as a result of this inventiona binder made in conformity with. the embodiment shown in the drawingwill be found to operate more efficiently, especially if the binder isone of the larger type.

Referring at this time to the specific details of construction, thebinder is made up of a pair of ordinary covers 3 a-nd l re spectively,which are connected by a back member 5, which is preferably flexible topermit free movement of the covers 3 and 4. A plate 6 and 7 is rigidlysecured to each of covers 3 and 4 respectively by means of rivets oranalogous devices 8. These plates LOOSE-LEAF BINDER.

S eria1 N0.131,414.,-; I

6 and? extend toward each other and the flexible back member 5 to apoint where they oin the, flexible arcuate back plateQ,

which as, is customary, carries a pair of toggle plates 10, each ofwhich supports a plurality of co-acting sheet engaginghooks 12. Plates10 have their inner edges articulated in'any suitable manner and theirouter edges engaged by the arcuate plate 9 along its edges; Plate 9 hasa plurality of curled lugs 13 which are disposed between like lugs 14:formed on the projecting edge of each plate 6 and .7. A hinge pin 15passes through the curled lugs 13 and 14 of the plates 6 and 7respectively to insure a hinged relation between the three members.

As shown in Fig. 2 this construction provides a flexible arcuate plateadapted to carry the well known toggle plates 10 which is supportedentirely independently of the back 5 of the binder. The coversthemselves through plates 6 and 7 support the entire mechanism of thebinder.

As has been previously set forth herein,

this new construction isextremely desirable and while the accompanyingdrawing shows but one form of the invention, it is desired not to belimited to any specific structure except as defined in the appendedclaims.

Having thus described my inventionwhat I claim and desire to secure byLetters Patent is:

1. A'loose leaf binder comprising a pair of covers, a flexible backmember connectmg said covers, a plate rigidly secured to each of saidcovers, a flexible back plate hingedly supported by said plates and apair of ring carrying toggle members carried by said flexible backplate.

2. The combination with a loose leaf binder having a pair of coversjoined by a flexible back member, of a flexible back plate supportedindependently of Said back member by a pair of plates secured to eachcover respectively and ring carrying toggle members carried by saidflexible back plate.

3. The combination with a loose leaf binder having apair of coversjoined by a flexible back member, of a flexible back plate hingedlysupported along its two edges by a pair of plates secured to each coverrespectively and a pair of co-acting, ring carrying, toggle plates,carried by said flexible back plate.

TJI

4.'In 'a loose leaf binder of the character described, a flexiblearcuate back "plate hingedly supported along its edges and a pair of rincarrying toggle plates mounted in said bac plate. 1

5. In a loose leaf binder of the character described, a flexible arcuateback plate, a pair of ring carrying toggle plates carried thereby andmeans hingedly engaging the sides of said arcuate back plate forhingedlysecuring the same to the covers of said binder. I I

6; In a loose leaf binder of the character described. a flexible arcuateback plate, tog- 15 gle plates carried thereby and means'hingedlyengaging the sides of said back plate for'supporting the same in spacedrelation to the back of said binder.

' 7. In a loose leaf binder of the character described, aflexiblearcuate back plate, ring carrying toggle plates articulated at theirinner edges and engaging the edges of said arcuate'back plate and meanssecured to each cover of the binder respectively and hingedly engagingthetog'gle plate engaging edges of said flexible arcuate backplate. I

ln'testimon'ywhereof, I alfix my signature this 17th day of August,1926.

RICHARD MQVJANYVALKENBURGH.

